ICD-9-CM procedure code (retired)
99.18 — Injection or infusion of electrolytes
About ICD-9-CM 99.18
99.18 is an ICD-9-CM procedure code for injection or infusion of electrolytes. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.
The CMS General Equivalence Mappings translate it to 4 ICD-10-PCS codes, such as 3E0337Z (Introduction of Electrolytic and Water Balance Substance into Peripheral Vein, Percutaneous Approach), 3E0437Z (Introduction of Electrolytic and Water Balance Substance into Central Vein, Percutaneous Approach) and 3E0537Z (Introduction of Electrolytic and Water Balance Substance into Peripheral Artery, Percutaneous Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 3E0337ZIntroduction of Electrolytic and Water Balance Substance into Peripheral Vein, Percutaneous Approachapproximate
- 3E0437ZIntroduction of Electrolytic and Water Balance Substance into Central Vein, Percutaneous Approachapproximate
- 3E0537ZIntroduction of Electrolytic and Water Balance Substance into Peripheral Artery, Percutaneous Approachapproximate
- 3E0637ZIntroduction of Electrolytic and Water Balance Substance into Central Artery, Percutaneous Approachapproximate
Common questions about 99.18
What is the ICD-10 code for ICD-9 99.18?
- The GEMs map 99.18 to ICD-10-PCS 3E0337Z, 3E0437Z, 3E0537Z and 3E0637Z.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.